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-rw-r--r--dom/file/MultipartBlobImpl.cpp338
1 files changed, 338 insertions, 0 deletions
diff --git a/dom/file/MultipartBlobImpl.cpp b/dom/file/MultipartBlobImpl.cpp
new file mode 100644
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--- /dev/null
+++ b/dom/file/MultipartBlobImpl.cpp
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+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "MultipartBlobImpl.h"
+#include "jsfriendapi.h"
+#include "mozilla/dom/BlobSet.h"
+#include "mozilla/dom/FileBinding.h"
+#include "mozilla/dom/UnionTypes.h"
+#include "nsComponentManagerUtils.h"
+#include "nsIGlobalObject.h"
+#include "nsIMultiplexInputStream.h"
+#include "nsReadableUtils.h"
+#include "nsRFPService.h"
+#include "nsStringStream.h"
+#include "nsTArray.h"
+#include "nsJSUtils.h"
+#include "nsContentUtils.h"
+#include <algorithm>
+
+using namespace mozilla;
+using namespace mozilla::dom;
+
+/* static */
+already_AddRefed<MultipartBlobImpl> MultipartBlobImpl::Create(
+ nsTArray<RefPtr<BlobImpl>>&& aBlobImpls, const nsAString& aName,
+ const nsAString& aContentType, RTPCallerType aRTPCallerType,
+ ErrorResult& aRv) {
+ RefPtr<MultipartBlobImpl> blobImpl =
+ new MultipartBlobImpl(std::move(aBlobImpls), aName, aContentType);
+ blobImpl->SetLengthAndModifiedDate(Some(aRTPCallerType), aRv);
+ if (NS_WARN_IF(aRv.Failed())) {
+ return nullptr;
+ }
+
+ return blobImpl.forget();
+}
+
+/* static */
+already_AddRefed<MultipartBlobImpl> MultipartBlobImpl::Create(
+ nsTArray<RefPtr<BlobImpl>>&& aBlobImpls, const nsAString& aContentType,
+ ErrorResult& aRv) {
+ RefPtr<MultipartBlobImpl> blobImpl =
+ new MultipartBlobImpl(std::move(aBlobImpls), aContentType);
+ blobImpl->SetLengthAndModifiedDate(/* aRTPCallerType */ Nothing(), aRv);
+ if (NS_WARN_IF(aRv.Failed())) {
+ return nullptr;
+ }
+
+ return blobImpl.forget();
+}
+
+void MultipartBlobImpl::CreateInputStream(nsIInputStream** aStream,
+ ErrorResult& aRv) const {
+ *aStream = nullptr;
+
+ uint32_t length = mBlobImpls.Length();
+ if (length == 0 || mLength == 0) {
+ aRv = NS_NewCStringInputStream(aStream, ""_ns);
+ return;
+ }
+
+ if (length == 1) {
+ BlobImpl* blobImpl = mBlobImpls.ElementAt(0);
+ blobImpl->CreateInputStream(aStream, aRv);
+ return;
+ }
+
+ nsCOMPtr<nsIMultiplexInputStream> stream =
+ do_CreateInstance("@mozilla.org/io/multiplex-input-stream;1");
+ if (NS_WARN_IF(!stream)) {
+ aRv.Throw(NS_ERROR_FAILURE);
+ return;
+ }
+
+ uint32_t i;
+ for (i = 0; i < length; i++) {
+ nsCOMPtr<nsIInputStream> scratchStream;
+ BlobImpl* blobImpl = mBlobImpls.ElementAt(i).get();
+
+ // nsIMultiplexInputStream doesn't work well with empty sub streams. Let's
+ // skip the empty blobs.
+ uint32_t size = blobImpl->GetSize(aRv);
+ if (NS_WARN_IF(aRv.Failed())) {
+ return;
+ }
+
+ if (size == 0) {
+ continue;
+ }
+
+ blobImpl->CreateInputStream(getter_AddRefs(scratchStream), aRv);
+ if (NS_WARN_IF(aRv.Failed())) {
+ return;
+ }
+
+ aRv = stream->AppendStream(scratchStream);
+ if (NS_WARN_IF(aRv.Failed())) {
+ return;
+ }
+ }
+
+ CallQueryInterface(stream, aStream);
+}
+
+already_AddRefed<BlobImpl> MultipartBlobImpl::CreateSlice(
+ uint64_t aStart, uint64_t aLength, const nsAString& aContentType,
+ ErrorResult& aRv) const {
+ // If we clamped to nothing we create an empty blob
+ nsTArray<RefPtr<BlobImpl>> blobImpls;
+
+ uint64_t length = aLength;
+ uint64_t skipStart = aStart;
+
+ // Prune the list of blobs if we can
+ uint32_t i;
+ for (i = 0; length && skipStart && i < mBlobImpls.Length(); i++) {
+ BlobImpl* blobImpl = mBlobImpls[i].get();
+
+ uint64_t l = blobImpl->GetSize(aRv);
+ if (NS_WARN_IF(aRv.Failed())) {
+ return nullptr;
+ }
+
+ if (skipStart < l) {
+ uint64_t upperBound = std::min<uint64_t>(l - skipStart, length);
+
+ RefPtr<BlobImpl> firstBlobImpl =
+ blobImpl->CreateSlice(skipStart, upperBound, aContentType, aRv);
+ if (NS_WARN_IF(aRv.Failed())) {
+ return nullptr;
+ }
+
+ // Avoid wrapping a single blob inside an MultipartBlobImpl
+ if (length == upperBound) {
+ return firstBlobImpl.forget();
+ }
+
+ blobImpls.AppendElement(firstBlobImpl);
+ length -= upperBound;
+ i++;
+ break;
+ }
+ skipStart -= l;
+ }
+
+ // Now append enough blobs until we're done
+ for (; length && i < mBlobImpls.Length(); i++) {
+ BlobImpl* blobImpl = mBlobImpls[i].get();
+
+ uint64_t l = blobImpl->GetSize(aRv);
+ if (NS_WARN_IF(aRv.Failed())) {
+ return nullptr;
+ }
+
+ if (length < l) {
+ RefPtr<BlobImpl> lastBlobImpl =
+ blobImpl->CreateSlice(0, length, aContentType, aRv);
+ if (NS_WARN_IF(aRv.Failed())) {
+ return nullptr;
+ }
+
+ blobImpls.AppendElement(lastBlobImpl);
+ } else {
+ blobImpls.AppendElement(blobImpl);
+ }
+ length -= std::min<uint64_t>(l, length);
+ }
+
+ // we can create our blob now
+ RefPtr<BlobImpl> impl = Create(std::move(blobImpls), aContentType, aRv);
+ if (NS_WARN_IF(aRv.Failed())) {
+ return nullptr;
+ }
+
+ return impl.forget();
+}
+
+void MultipartBlobImpl::InitializeBlob(RTPCallerType aRTPCallerType,
+ ErrorResult& aRv) {
+ SetLengthAndModifiedDate(Some(aRTPCallerType), aRv);
+ NS_WARNING_ASSERTION(!aRv.Failed(), "SetLengthAndModifiedDate failed");
+}
+
+void MultipartBlobImpl::InitializeBlob(const Sequence<Blob::BlobPart>& aData,
+ const nsAString& aContentType,
+ bool aNativeEOL,
+ RTPCallerType aRTPCallerType,
+ ErrorResult& aRv) {
+ mContentType = aContentType;
+ BlobSet blobSet;
+
+ for (uint32_t i = 0, len = aData.Length(); i < len; ++i) {
+ const Blob::BlobPart& data = aData[i];
+
+ if (data.IsBlob()) {
+ RefPtr<Blob> blob = data.GetAsBlob().get();
+ aRv = blobSet.AppendBlobImpl(blob->Impl());
+ if (aRv.Failed()) {
+ return;
+ }
+ }
+
+ else if (data.IsUTF8String()) {
+ aRv = blobSet.AppendUTF8String(data.GetAsUTF8String(), aNativeEOL);
+ if (aRv.Failed()) {
+ return;
+ }
+ }
+
+ else if (data.IsArrayBuffer()) {
+ const ArrayBuffer& buffer = data.GetAsArrayBuffer();
+ buffer.ComputeState();
+ aRv = blobSet.AppendVoidPtr(buffer.Data(), buffer.Length());
+ if (aRv.Failed()) {
+ return;
+ }
+ }
+
+ else if (data.IsArrayBufferView()) {
+ const ArrayBufferView& buffer = data.GetAsArrayBufferView();
+ buffer.ComputeState();
+ aRv = blobSet.AppendVoidPtr(buffer.Data(), buffer.Length());
+ if (aRv.Failed()) {
+ return;
+ }
+ }
+
+ else {
+ MOZ_CRASH("Impossible blob data type.");
+ }
+ }
+
+ mBlobImpls = blobSet.GetBlobImpls();
+ SetLengthAndModifiedDate(Some(aRTPCallerType), aRv);
+ NS_WARNING_ASSERTION(!aRv.Failed(), "SetLengthAndModifiedDate failed");
+}
+
+void MultipartBlobImpl::SetLengthAndModifiedDate(
+ const Maybe<RTPCallerType>& aRTPCallerType, ErrorResult& aRv) {
+ MOZ_ASSERT(mLength == MULTIPARTBLOBIMPL_UNKNOWN_LENGTH);
+ MOZ_ASSERT_IF(mIsFile, IsLastModificationDateUnset());
+
+ uint64_t totalLength = 0;
+ int64_t lastModified = 0;
+ bool lastModifiedSet = false;
+
+ for (uint32_t index = 0, count = mBlobImpls.Length(); index < count;
+ index++) {
+ RefPtr<BlobImpl>& blob = mBlobImpls[index];
+
+ uint64_t subBlobLength = blob->GetSize(aRv);
+ if (NS_WARN_IF(aRv.Failed())) {
+ return;
+ }
+
+ MOZ_ASSERT(UINT64_MAX - subBlobLength >= totalLength);
+ totalLength += subBlobLength;
+
+ if (blob->IsFile()) {
+ int64_t partLastModified = blob->GetLastModified(aRv);
+ if (NS_WARN_IF(aRv.Failed())) {
+ return;
+ }
+
+ if (lastModified < partLastModified) {
+ lastModified = partLastModified * PR_USEC_PER_MSEC;
+ lastModifiedSet = true;
+ }
+ }
+ }
+
+ mLength = totalLength;
+
+ if (mIsFile) {
+ if (lastModifiedSet) {
+ SetLastModificationDatePrecisely(lastModified);
+ } else {
+ MOZ_ASSERT(aRTPCallerType.isSome());
+
+ // We cannot use PR_Now() because bug 493756 and, for this reason:
+ // var x = new Date(); var f = new File(...);
+ // x.getTime() < f.dateModified.getTime()
+ // could fail.
+ SetLastModificationDate(aRTPCallerType.value(), JS_Now());
+ }
+ }
+}
+
+size_t MultipartBlobImpl::GetAllocationSize() const {
+ FallibleTArray<BlobImpl*> visitedBlobs;
+
+ // We want to report the unique blob allocation, avoiding duplicated blobs in
+ // the multipart blob tree.
+ size_t total = 0;
+ for (uint32_t i = 0; i < mBlobImpls.Length(); ++i) {
+ total += mBlobImpls[i]->GetAllocationSize(visitedBlobs);
+ }
+
+ return total;
+}
+
+size_t MultipartBlobImpl::GetAllocationSize(
+ FallibleTArray<BlobImpl*>& aVisitedBlobs) const {
+ FallibleTArray<BlobImpl*> visitedBlobs;
+
+ size_t total = 0;
+ for (BlobImpl* blobImpl : mBlobImpls) {
+ if (!aVisitedBlobs.Contains(blobImpl)) {
+ if (NS_WARN_IF(!aVisitedBlobs.AppendElement(blobImpl, fallible))) {
+ return 0;
+ }
+ total += blobImpl->GetAllocationSize(aVisitedBlobs);
+ }
+ }
+
+ return total;
+}
+
+void MultipartBlobImpl::GetBlobImplType(nsAString& aBlobImplType) const {
+ aBlobImplType.AssignLiteral("MultipartBlobImpl[");
+
+ StringJoinAppend(aBlobImplType, u", "_ns, mBlobImpls,
+ [](nsAString& dest, BlobImpl* subBlobImpl) {
+ nsAutoString blobImplType;
+ subBlobImpl->GetBlobImplType(blobImplType);
+
+ dest.Append(blobImplType);
+ });
+
+ aBlobImplType.AppendLiteral("]");
+}
+
+void MultipartBlobImpl::SetLastModified(int64_t aLastModified) {
+ SetLastModificationDatePrecisely(aLastModified * PR_USEC_PER_MSEC);
+}